Samtemdo8 said:
this is on the same Source Engine thats still hasn't changed since Half-Life 2 back in 2004?
The Source Engine has changed plenty since 2004. Back when it was first released, it didn't have support for multi-core processors, or HDR rendering, or threaded particle effects, and a whole bunch of other features and technologies. It's been heavily upgraded, modified and expanded. So much so that a game or mod made using the 2004 version will probably not run properly, if at all, on the current version.
Thing is, Source was set up to be modular and improved in small increments over time, as opposed to the big 'version jump' overhauls of competitors like Unreal of Cry-Engine, which is probably why Valve never added a number at the end until Source 2. And even Source 2 isn't made from scratch, but based on the original Source, which distantly originated from GoldSrc, which in turn was a modified version of the Quake Engine (i.e. id Tech 2). It's quite possible there's still bits of code from the Quake engine somewhere in Source 2. Same probably goes for most long-running game engines like Unreal, Cry Engine and id Tech (none of which are static anymore either). It's actually pretty uncommon for a new version to be made completely from the ground up.
And none of that stops a developer from making their own modifications to an engine, to the point it's essentially a new engine. Bethesda turned GameBryo into the Creation Engine, or the abovementioned id Tech 2 > GoldSrc. Who knows how much stuff the Black Mesa team added to Source, possibly with help from Valve themselves?
